Combined valve-cutter and valve-seat reamer



W. E. FEHR.

COMBINED VALVE CUTTER AND VALVE SEAT REAMER.

APPLICATION FILED JUNEZB. 1919.

1 377,47O. Patented May 10, 1921- amuewto'c ell 01,449.11

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PAT

WALTER E. FEHR, or BALTIMORE, MARYLAND.

COMBINED VALVE-CUTTER AND VALVE-SEAT REAMER.

Application filed June 23, 1919.

To all whom it may concern:

Be it known that I, WALTER E. Fnmga citizen of the United States, residing at Baltimore, State of Maryland, have invented certainnew and useful Improvements in Combined Valve-Cutters and Valve-Seat Ream-v ers, of which the following is a specification.

This invention relates to a combination valve cutter and valve seat refacer or reamer.

The object of the invention is to provide a tool of this character having reversible blades to adapt it to be used for cutting a new face on a valve and for refacing its seat.

Another object is to provide a tool of this character with improved means for readily disengaging it from a valve seat in connection with which it has been used.

Another object is to. provide an improved tool for attaching and releasing the blades to provide for their reversal.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings Figure 1 is a side elevation partly in section of a tool constructed in accordance with this invention, shown applied, and in use for facing a valve seat,

Fig. 2 is a transverse section taken on the line 2-2 of Fig.1,

Fig. 3 is a similar view taken on the line 33 of Fig. 1,

Fig. 4: is a similar view taken on the line 4-4 of Fig. 1,

Fig. 5 is a side elevation of the tool shown in use for grinding a valve, and

Fig. 6 is a side elevation of the wrench used for removing and applying the bolts which hold the blades of the tool engaged. with the stock.

The device constituting this invention comprises a stock 1, here shown hexagonal in cross section, with channels or grooves 2 extending longitudinally of the alternate faces thereof, and a bore extending centrally therethrough. These channels 2 are substantially V-shaped in cross section one Specification of Letters Patent.

Patented May 10, 1921.

Serial No. 306,136.

blades 4;, which are in the form of rectangular bars, have one end rectilinear and designed to be positioned flush with one end of the stock when in operative position. These blades are made longer than the length of the stock, and the ends which project therebeyond are beveled from edge to edge and from face to face of the bars as shown at 5, to form cutting edges which are designed to perform the work of grinding a valve V or facing its seat S in a manner hereinafter more fully to be described.

wall being wider than the other, and are de- These blades 4 are removably held in the seats 3 by means of bolts 6 which extend transversely of the stock, being inserted in sockets 7 which open through the wider side walls of the channels 2 as is shown clearly in Fig. 3, said wall being parallel with the blade seat in the adjacent face of the stock. These bolts or set screws 6 are designed when inserted to have their heads flush with or countersunk inthe channel side walls. The inner ends of these bolts are preferably hollowed out or made concave as shown at 8 to provide biting edges for engaging the side walls of the blades 4 to clamp said blades and hold them securely in their seats.

The outer ends of the bolts 6 have sockets 9 with notches 10 in the side walls thereof to receive ribs or bits 12 formed on the opposite ends of a wrench 11 which is designed for use in inserting and removing these bolts. This wrench 11 shown in detail in Fig. 6, is made L-shaped with bits 12 on each end, so that either end may be applied to the bolts at the will of the user.

From the above description it will be obvious that the blades 1 may be readily disengaged by loosening bolts 6 and their positions reversed to dispose their cutting edges 5 either outward as shown in Fig. 1 for refacing a valve seat S or they may be turned inward as shown in Fig. 5 for grinding the beveled periphery of a valve V, it

VS will be passed through the central bore of the stock as shown in Fig. 5, the end of the valve stem being securely held in a vise or other suitable support; the stock can then be rotated by hand, exerting force against the valve.

To adapt the device to be used for refacing a valve seat S, a T-shaped tool 15 is employed, which is preferably constructed of a heavy metal rod with one end bent to form the head of the T which provides a hand grip for the tool. The stem 15 of this tool corresponds in size to the central bore in the stock 1 and is designed to be inserted there through and secured by means of a rod or pin 14 which extends through a groove forming a seat 13 in the rear end of stock 1 and through an aperture extending transversely through the stem 15 as is shown clearly in Figs. 1 and 2. This rod thus operates to hold the stock and stem against relative turning. A cotter pin 17 extends transversely through an aperture in the stem 15% in advance of the stock 1, said aperture being spaced from the aperture through which rod 14 extends a distance greater than the length of stock 1, so as to afford a slight play of the stock between the pins 14 and 17 to facilitate the removal and insertion of the pin, and yet is not sufiicient to permit rod 14 to pass out of groove 13. The cotter pin 17 is designed to prevent the stock from slipping off the stem 15 of the tool.

In the use of this device, for refacing a valve seat, the blades are positioned with their beveled faces outward as shown in Fig. 1 and the tool 15 has its stem 15 passed through stock 1 and secured by the rod 14 and pin 17, by means of which the stock is fastened to the tool midway the ends of its stem 15 or slightly beyond the center thereof, so that the free end of stem 15 may be inserted in the engine cylinder and operate to stabilize the tool on the seat S. When the device is so positioned, force is exerted on the handle 16 to properly seat the cutting edges 5 adapting them to closely contact with the face of the seat to be treated. The device is then rotated to cause the cutting edges 5 to remove all carbon and irregularities which may have formed on said valve seat, and which would operate to prevent the proper seating of the valve.

From the foregoing description, taken in connection with the accompanying drawings, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention appertains and while I have described the principle of operation of the invention together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the devic shown is merely illustrative and that such changes may be made as are within the scope of the claimed invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

A device of the class described comprising a stock having means convertible to out either a valve or its seat, said stock having a central bore, a stabilizing and operating device for said stock comprising a rod to be passed through said bore, said stool: having a groove in one end, and said rod having longitudinally spaced apertures extending transversely therethrough, and pins extending through said apertures so as to be situated adjacent opposite ends of the stock, one of said pins lying in said stock groove.

In testimony whereof I affiX my signature in the presence of two Witnesses.

WALTER E. FEHR.

Witnesses:

WALTER E. SMITH, EMANUEL DOUGHERTY. 

